Preparation method for multi-level structured molybdenum disulfide microsphere negative electrode material of lithium battery
A technology of molybdenum disulfide and negative electrode materials, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of uneven distribution, poor cycle performance and rate performance, cumbersome preparation process, etc., and achieve excellent electrochemical performance , excellent electrochemical performance, and the effect of shortening the transmission path
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[0031] Example 1
[0032] Weigh the required amount of sodium molybdate dihydrate (Na 2 MoO 4 ·2H 2 O) and urea (H 2 NCSNH 2 ) And dissolved in deionized water to prepare a mixed solution of sodium molybdate and urea, so that the sodium molybdate (Na 2 MoO 4 ) And urea (H 2 NCSNH 2 The molar ratio of) is controlled at 1:1, and the mixed solution is stirred for 15 minutes with a magnetic stirrer at a speed of 150r / min to obtain a clear mixed solution that is evenly mixed. At this time, a 37% hydrochloric acid solution with a mass fraction of 37% is added dropwise to mix The pH of the solution is 1, and then the mixed solution is transferred to a reaction kettle with polytetrafluoroethylene as the substrate. The reaction kettle is placed in an oven and kept at 150°C for 4 hours, and then the reaction kettle is naturally cooled with the oven to At room temperature, take out the mixed solution after the reaction, centrifuge at 3000r / min to separate the reaction solution and wash the c...
Example Embodiment
[0040] Example 2
[0041] Weigh the required amount of sodium molybdate dihydrate (Na2MoO 4 ·2H 2 O) and urea (H 2 NCSNH 2 ) And dissolved in deionized water to prepare a mixed solution of sodium molybdate and urea, so that the sodium molybdate (Na 2 MoO 4 ) And urea (H 2 NCSNH 2 The molar ratio of) is controlled at 1:5. Use a magnetic stirrer to stir the mixed solution at a speed of 150r / min for 20 minutes to obtain a clear mixed solution with a uniform mixture of the two. At this time, drop a 37% hydrochloric acid solution drop by drop to mix The pH of the solution is 1, and the mixed solution is transferred to a reaction kettle with polytetrafluoroethylene as the substrate. The reaction kettle is placed in an oven and kept at 200°C for 5 hours, and then the reaction kettle is naturally cooled with the oven to At room temperature, take out the mixed solution after the reaction, centrifuge at 5000r / min to separate the reaction solution and wash the centrifuged reactant with deion...
Example Embodiment
[0044] Example 3
[0045] Weigh the required amount of sodium molybdate dihydrate (Na 2 MoO 4 ·2H 2 O) and urea (H 2 NCSNH 2 ) And dissolved in deionized water to prepare a mixed solution of sodium molybdate and urea, so that the sodium molybdate (Na 2 MoO 4 ) And urea (H 2 NCSNH 2 The molar ratio of) is controlled at 1:10. Use a magnetic stirrer to stir the mixed solution at a speed of 150r / min for 15 minutes to obtain a clear mixed solution that is evenly mixed. At this time, drop a 37% hydrochloric acid solution drop by drop to mix The pH of the solution was 0.7, and the mixed solution was transferred to a reaction kettle with polytetrafluoroethylene as the substrate. The reaction kettle was placed in an oven and kept at 250°C for 6 hours, and then the reaction kettle was naturally cooled with the oven to At room temperature, take out the mixed solution after the reaction, centrifuge at 6000r / min to separate the reaction solution and wash the centrifuged reactant with deionized...
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